TITLE:
M-ary FSK Modulation Using Short Packet without a Preamble and Error Detection Codes for Low Power Wireless Communication
AUTHORS:
Hironao Okada, Toshihiro Itoh
KEYWORDS:
Low Power; Wireless Communication; Sensor Network System; MFSK
JOURNAL NAME:
Wireless Sensor Network,
Vol.6 No.3,
March
28,
2014
ABSTRACT: Since power of a wireless sensor node is limited, low power
communication technology has been required. M-ary frequency shift keying (MFSK)
modulation with orthogonal signals is one of the methods to decrease the power.
However, if the amount of transmitted data including such as an identification
number (ID) of a node and measured data is small, a ratio of the data length to
the total packet length, which means transmission efficiency, becomes quite
low. Because a preamble and error check codes are generally added to a packet
for synchronization between a transmitter and a receiver and for decrease in reception
errors, respectively. In this research, we have developed a method with digital
filters which eliminates the other signals from time series frequency spectra
not to use a preamble and error check codes. Although estimated synchronization
loss of the method was less than 1.6 dB, it was found that the loss of the
method on error packet rate was almost 0 dB at more than 0.001 of packet error
rate by a simulation made by BASIC. These results indicate a possibility to
realize that a packet which consists of only two symbols can be received with
no error if the transmitted data is less than 14 bits using 128-FSK.